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Fig. 1. Wnt11 expression in the DML and Wnt6 expression in the
ectoderm overlying the somites are mutually exclusive. (A,E)
Whole-mount in situ hybridization of HH stage 15 chick embryos hybridized with
Wnt6 (A) and Wnt11 (E) probes. (B-D) Transverse sections at different
anteroposterior levels of the embryo shown in A. (B) Section at the level of
an epithelial somite. Wnt6 expression in the ectoderm overlying the
neural tube, the paraxial mesoderm and the lateral plate mesoderm. (C,D) The
somite has compartmentalized and the dermomyotome and the sclerotome are
visible. Wnt6 expression is restricted to the ectoderm overlying the
lateral lip of the dermomyotome and the lateral plate mesoderm. (F-H)
Transverse sections of the embryo shown in E at the AP levels indicated. At
the level of the presomitic mesoderm (not shown) and the epithelial somite
(F), Wnt11 is not expressed. Wnt11 expression starts after
compartmentalization of the somite into dermomyotome and sclerotome, with
strong expression in the dorsomedial lip of the dermomyotome (G,H).
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